package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.vo.EmployeeVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public Integer addEmp(EmployeeDTO employeeDTO) {

        log.info("[Service] thread:{}",Thread.currentThread().getId());
        // 将DTO 转换为 Entry
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        // 状态
        employee.setStatus(1);
        // 设置默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        // 获取token
        // 配置默认值
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        Long empID = BaseContext.getCurrentId();
        employee.setCreateUser(empID);
        employee.setUpdateUser(empID);
        return employeeMapper.insertEmp(employee);

    }

    @Override
    public PageResult findByPage(EmployeePageQueryDTO employeePageQueryDTO) {
        // 配置分页查询参数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        // 条件查询
        List<Employee> employees = employeeMapper.selectByPage(employeePageQueryDTO.getName());

        // 将emps 转成 Page对象
        Page<Employee> page = (Page<Employee>) employees;

        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public Integer enableOrNotStatus(Integer status, Long id) {

        // 生成实体类文件
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        return employeeMapper.updateById(employee);
    }


    @Override
    public EmployeeVO findById(Long id) {

        Employee employee = employeeMapper.selectById(id);
        EmployeeVO employeeVO = new EmployeeVO();
        if (employee != null) {

            BeanUtils.copyProperties(employee,employeeVO);
        }
        return employeeVO;
    }

    @Override
    public Integer updateById(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        // 更新用户人信息
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());

        log.info("[更新用户信息] emp:{}",employee);
        return employeeMapper.updateById(employee);
    }

}

// DTO ： 从前端请求过来的数据 json
// 实体类 ： 去操作数据库，读/写
// VO：   从后端返回到前端的数据
